Import of readline 4.3.

Non-readline modified files:

src/gdb/ChangeLog src/gdb/defs.h src/gdb/cli/cli-cmds.c
src/gdb/cli/cli-setshow.c src/gdb/tui/ChangeLog
src/gdb/tui/tuiWin.c

In readline directory:

        * compat.c, mbutil.c, misc.c, rlmbutil.h, rltypedefs.h,
        text.c, doc/history.0, doc/history.3, support/wcwidth.c,
        examples/readlinebuf.h, examples/rlcat.c: New files.

        * CHANGELOG, CHANGES, INSTALL,  MANIFEST, Makefile.in, README,
        aclocal.m4, ansi_stdlib.h, bind.c, callback.c, chardefs.h,
        complete.c, config.h.in, configure, configure.in, display.c,
        emacs_keymap.c, funmap.c, histexpand.c, histfile.c, histlib.h,
        history.c, history.h, histsearch.c, input.c, isearch.c,
        keymaps.c, keymaps.h, kill.c, macro.c, nls.c, parens.c,
        posixdir.h, readline.c, readline.h, rlconf.h, rldefs.h,
        rlprivate.h, rlshell.h, rlstdc.h, rltty.c, savestring.c,
        search.c, shell.c, signals.c, terminal.c, tilde.c, tilde.h,
        undo.c, util.c, vi_keymap.c, vi_mode.c, xmalloc.c, xmalloc.h,
        doc/Makefile.in, doc/hist.texinfo, doc/hstech.texinfo,
        doc/hsuser.texinfo, doc/manvers.texinfo, doc/readline.3,
        doc/rlman.texinfo, doc/rltech.texinfo, doc/rluser.texinfo
        doc/rluserman.texinfo, doc/texi2dvi, doc/texi2html,
        shlib/Makefile.in, support/install.sh, support/mkdirs,
        support/mkdist, support/shlib-install, support/shobj-conf,
        examples/Inputrc, examples/Makefile.in, examples/fileman.c,
        examples/histexamp.c, examples/manexamp.c, examples/rl.c,
        examples/rlfe.c, examples/rltest.c, examples/rlversion.c:
        Modified files.

readline/callback.c

@@ -30,6 +30,13 @@
 #if defined (READLINE_CALLBACKS)
 
 #include <sys/types.h>
+
+#ifdef HAVE_STDLIB_H
+#  include <stdlib.h>
+#else
+#  include "ansi_stdlib.h"
+#endif
+
 #include <stdio.h>
 
 /* System-specific feature definitions and include files. */
@@ -52,7 +59,7 @@
    text read in at each end of line.  The terminal is kept prepped and
    signals handled all the time, except during calls to the user's function. */
 
-VFunction *rl_linefunc;		/* user callback function */
+rl_vcpfunc_t *rl_linefunc;		/* user callback function */
 static int in_handler;		/* terminal_prepped and signals set? */
 
 /* Make sure the terminal is set up, initialize readline, and prompt. */
@@ -78,11 +85,10 @@ _rl_callback_newline ()
 /* Install a readline handler, set up the terminal, and issue the prompt. */
 void
 rl_callback_handler_install (prompt, linefunc)
-     char *prompt;
-     VFunction *linefunc;
+     const char *prompt;
+     rl_vcpfunc_t *linefunc;
 {
-  rl_prompt = prompt;
-  rl_visible_prompt_length = rl_prompt ? rl_expand_prompt (rl_prompt) : 0;
+  rl_set_prompt (prompt);
   rl_linefunc = linefunc;
   _rl_callback_newline ();
 }
@@ -102,24 +108,33 @@ rl_callback_read_char ()
 
   eof = readline_internal_char ();
 
-  if (rl_done)
+  /* We loop in case some function has pushed input back with rl_execute_next. */
+  for (;;)
     {
-      line = readline_internal_teardown (eof);
+      if (rl_done)
+	{
+	  line = readline_internal_teardown (eof);
 
-      (*rl_deprep_term_function) ();
+	  (*rl_deprep_term_function) ();
 #if defined (HANDLE_SIGNALS)
-      rl_clear_signals ();
+	  rl_clear_signals ();
 #endif
-      in_handler = 0;
-      (*rl_linefunc) (line);
+	  in_handler = 0;
+	  (*rl_linefunc) (line);
 
-    /* If the user did not clear out the line, do it for him. */
-    if (rl_line_buffer[0])
-      _rl_init_line_state ();
+	  /* If the user did not clear out the line, do it for him. */
+	  if (rl_line_buffer[0])
+	    _rl_init_line_state ();
 
-    /* Redisplay the prompt if readline_handler_{install,remove} not called. */
-      if (in_handler == 0 && rl_linefunc)
-	_rl_callback_newline ();
+	  /* Redisplay the prompt if readline_handler_{install,remove}
+	     not called. */
+	  if (in_handler == 0 && rl_linefunc)
+	    _rl_callback_newline ();
+	}
+      if (rl_pending_input)
+	eof = readline_internal_char ();
+      else
+        break;
     }
 }